Dowanol PM is just a brand name of Propylene Glycol Methyl Ether also known as 1 methoxy 2 propanol ,it is very useful for alsorts of things .Its boiling point (BP) is 120 centigrade. So it doesnt evaporate as fast as acetone . Its useful as a solvent to thin varnishes .
G/Flex is the West system epoxy G/Flex 650.
When i said easily removed i meant that it came off easily , actually dissolving epoxy is another thing . People have done tests letting epoxy sit in acetone for weeks and it didnt dissolve just went soft ,rubbery and crumbly.